EP2938875B1 - Soupape de réglage de pression pour un système d'injection de carburant - Google Patents

Soupape de réglage de pression pour un système d'injection de carburant Download PDF

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Publication number
EP2938875B1
EP2938875B1 EP13786516.8A EP13786516A EP2938875B1 EP 2938875 B1 EP2938875 B1 EP 2938875B1 EP 13786516 A EP13786516 A EP 13786516A EP 2938875 B1 EP2938875 B1 EP 2938875B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure control
control valve
closing element
spherical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13786516.8A
Other languages
German (de)
English (en)
Other versions
EP2938875A1 (fr
Inventor
Stefan Schuerg
Vittorio Caroli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2938875A1 publication Critical patent/EP2938875A1/fr
Application granted granted Critical
Publication of EP2938875B1 publication Critical patent/EP2938875B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the common rail
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for

Definitions

  • the invention relates to a pressure regulating valve for a fuel injection system, in particular a common rail injection system for pressure control in a high-pressure fuel storage, with the features of the preamble of claim 1.
  • a pressure regulating valve of the aforementioned type comprises a valve housing in which a magnetic actuator and an armature cooperating with the magnetic actuator are accommodated, and a valve member which is connected to the valve housing.
  • a mostly conical valve seat is formed, which cooperates with a spherical valve closing element.
  • the armature has an anchor pin or anchor bolt which serves as a force transmission member and acts on the spherical valve closure element in such a way that it is pressed against the valve seat when the magnetic actuator is energized via the anchor pin or anchor bolt.
  • the anchor pin or the anchor bolt generally have a dome-shaped receptacle for the radial guidance of the spherical valve closure element, which is produced by means of embossing.
  • the present invention has for its object to provide a pressure control valve, which does not have the disadvantages mentioned above.
  • the proposed pressure control valve includes a solenoid actuator for actuating a spherical valve closure member, the solenoid actuator cooperating with a liftable armature connected to an anchor pin for transmitting the force of the solenoid actuator to the spherical valve closure member.
  • the spherical valve closing element and / or the anchor pin are guided in an axially displaceable manner in a valve piece which forms a valve seat cooperating with the spherical valve closing element.
  • at least the spherical valve closing element is axially displaceably guided over the valve piece in such a way that it can no longer perform a radial movement when opening or closing.
  • the anchor pin is guided axially displaceably over the valve piece.
  • the leadership of the anchor pin and the spherical valve closing element is thus carried out on one and the same component. This does not exclude that the anchor pin further in another component of the pressure regulating valve, for example, in a valve housing of the valve, is guided axially displaceable. If there should be an axial offset between the guide in the valve housing and the valve seat, this is compensated by the valve seat closer to the guide in the valve piece.
  • the valve piece has at least two guide surfaces, which limit the radial movement space of the spherical valve closing element and / or the anchor pin.
  • the number of guide surfaces can be even or odd. With an even number of guide surfaces, preferably at least two of the radial movement space of the spherical valve closing element and / or the anchor pin limiting guide surfaces are opposite. These guide surfaces are then aligned parallel to each other.
  • At least two guide surfaces connect directly to the valve seat, which is preferably conical in shape. This means that the guide surfaces grow out of the valve seat.
  • the guide surfaces are axially aligned. The axially extending guide surfaces are therefore preferably on the conical surface of the valve seat.
  • the spherical valve closure element is preferably performed.
  • the anchor pin which has a larger outer diameter than the spherical valve closing element, further preferably guide surfaces are provided, which are arranged opposite to the immediately adjacent to the valve seat guide surfaces radially outward.
  • the guide surfaces for guiding the spherical valve closing element and / or the anchor pin formed on radially extending webs form the guide surfaces.
  • the radially extending webs are arranged at the same angular distance from each other. In three webs, the angular distance - in each case based on the central axes of the webs - 120 °, four webs 90 °, etc. Four webs are therefore preferably cross-shaped and five webs arranged in a star shape, wherein the webs - in contrast to a cross or star - do not cross.
  • the webs limit flow channels. This means that the free spaces between the webs can be used as flow channels in order to ensure the expiry of a controlled via the pressure control valve amount.
  • At least part of the flow channels is hydraulically connected to an armature space.
  • the armature space is therefore connected via at least one flow channel with a formed in the valve piece valve chamber of the pressure control valve. The connection allows pressure equalization between the valve chamber and the armature space.
  • the guide surfaces for guiding the spherical valve member and / or the anchor pin preferably form tangents with respect to the outer diameter of the spherical valve closure member and / or the anchor pin.
  • the spherical valve closure element accordingly has a punctiform contact region and the cylindrical anchor pin has a linear contact region with the respective associated guide surfaces. The contact area is thus reduced to a minimum.
  • the valve piece is a metal powder injection molded part. As such, it has been produced in a metal injection molding (MIM) process. The use of such a method simplifies the manufacture of the valve piece including the guide surfaces.
  • MIM metal injection molding
  • the valve piece has a biting edge on a support surface facing away from the valve seat.
  • the support surface serves to support the valve piece or the pressure control valve when inserted into a stepped bore of a High-pressure accumulator body. About the biting edge can then be achieved a sealing effect.
  • the proposed pressure control valve is designed as a 2/2-way valve.
  • the pressure control valve is particularly suitable for use in a high-pressure fuel storage. In an open position of the pressure regulating valve, a connection of the high pressure accumulator is made with a return, so that the pressure in the high pressure accumulator can be reduced. In a closed position of the pressure control valve, the connection of the high-pressure accumulator is separated to the return, so that pressure can be built up.
  • FIG. 1 illustrated pressure control valve comprises a magnetic actuator 1, which has an annular magnetic coil 17 and cooperates with a liftable armature 3, which is designed in the present case as a plunger armature.
  • the armature 3 is connected to an anchor pin 4, which transmits, as a force transmitting member, the force of the magnetic actuator 1 to a spherical valve closure member 2 when the magnetic actuator 1 is activated, ie. the solenoid 17 is energized.
  • the armature 3 including the anchor pin 4 are moved counter to the spring force of a spring 15 in the direction of the spherical valve closing element 2.
  • the pressure control valve is presently received in a stepped bore 18 of the high pressure accumulator 13 and connected via a screw 19 with this.
  • an external thread is formed on a valve housing 14 of the pressure control valve, which is connectable to an internal thread of the stepped bore 18.
  • the pressure control valve can be axially biased against the high-pressure accumulator, wherein the pressure control valve is supported via a support surface 11 of a valve member 5 at a stage of the stepped bore 18.
  • a trained in the region of the support surface 11 biting edge 12 seals the high-pressure accumulator 13 to the outside.
  • valve piece 5, which also forms the valve seat 6, has a first guide area a for guiding the spherical valve closure element 2 and a second guide area b for guiding the anchor pin 4.
  • the guide is effected in each case via five guide surfaces 7, which are each formed by five webs 8, which are arranged in a star shape around the valve seat 6 around.
  • the five webs 8 of a guide region a, b are each arranged at the same angular distance from each other, so that between the webs 8 flow channels 9 are formed, which are hydraulically connected to an armature space 10 (see FIG. 1 ).
  • the guide surfaces 7 for guiding the spherical valve closing element 2 are located further radially inward than the guide surfaces 7, which serve to guide the anchor pin 4.
  • the guide surfaces 7 for guiding the anchor pin 4 are formed by separate webs 8, which in the present case are arranged in the same angular position as the webs 8 for forming the guide surfaces 7 for guiding the spherical valve closing element 2. In this way, the respectively formed between the webs 8 flow channels 9 overlap.
  • FIG. 2 can also be seen, connect the webs 8 including the guide surfaces 7 of the guide portion a directly to the conical surface of the valve seat 6. They rise, as it were, out of the valve seat area.
  • the conical surface of the valve seat 6 goes beyond, so that the webs 8 of the Guide area b from the conical surface of the valve seat 6 raise. Accordingly, the webs 8 of the two guide areas a, b are connected via the conical surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (6)

  1. Soupape de réglage de pression pour un système d'injection de carburant, en particulier un système d'injection à rampe commune pour la régulation de la pression dans un accumulateur haute pression de carburant, comprenant un actionneur magnétique (1) pour actionner un élément sphérique de fermeture de soupape (2), dans laquelle l'actionneur magnétique (1) coopère avec un induit mobile en levée (3), qui est relié à une tige d'induit (4) pour la transmission de la force de l'actionneur magnétique (1) à l'élément sphérique de fermeture de soupape (2), dans laquelle l'élément sphérique de fermeture de soupape (2) et la tige d'induit (3) sont guidés de façon déplaçable axialement dans une pièce de soupape (5), qui forme un siège de soupape (6) coopérant avec l'élément sphérique de fermeture de soupape (2),
    caractérisée en ce que la pièce de soupape (5) comporte au moins deux faces de guidage (7), qui limitent l'espace de mouvement radial de l'élément sphérique de fermeture de soupape (2), dans laquelle les faces de guidage (7) sont formées sur des nervures s'étendant radialement (8), qui sont disposées de préférence à égale distance angulaire l'une de l'autre et qui limitent des canaux d'écoulement (9), dans laquelle la pièce de soupape (5) comporte sur une face d'appui (11) détournée du siège de soupape (6) une arête vive (12).
  2. Soupape de réglage de pression selon la revendication 1, caractérisée en ce qu'au moins deux faces de guidage (7) se raccordent directement au siège de soupape (6), qui est de préférence de forme conique.
  3. Soupape de réglage de pression selon une des revendications 1 ou 2, caractérisée en ce qu'au moins une partie des canaux d'écoulement (9) sont hydrauliquement reliés à une chambre d'induit (10).
  4. Soupape de réglage de pression selon l'une quelconque des revendications 1 à 3, caractérisée en ce que les faces de guidage (7) forment dans une section transversale de la pièce de soupape (5) des tangentes par rapport au diamètre extérieur de l'élément sphérique de fermeture de soupape (2) et/ou de la tige d'induit (4).
  5. Soupape de réglage de pression selon l'une quelconque des revendications précédentes, caractérisée en ce que la pièce de soupape (5) est une pièce moulée par injection de poudre métallique.
  6. Soupape de réglage de pression selon l'une quelconque des revendications précédentes, caractérisée en ce que la soupape de réglage de pression est conçue comme une vanne à 2/2 voies.
EP13786516.8A 2012-12-27 2013-11-07 Soupape de réglage de pression pour un système d'injection de carburant Active EP2938875B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012224403.4A DE102012224403A1 (de) 2012-12-27 2012-12-27 Druckregelventil für ein Kraftstoffeinspritzsystem
PCT/EP2013/073294 WO2014102028A1 (fr) 2012-12-27 2013-11-07 Soupape de réglage de pression pour un système d'injection de carburant

Publications (2)

Publication Number Publication Date
EP2938875A1 EP2938875A1 (fr) 2015-11-04
EP2938875B1 true EP2938875B1 (fr) 2019-03-13

Family

ID=49546427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13786516.8A Active EP2938875B1 (fr) 2012-12-27 2013-11-07 Soupape de réglage de pression pour un système d'injection de carburant

Country Status (6)

Country Link
US (1) US10041459B2 (fr)
EP (1) EP2938875B1 (fr)
JP (1) JP6343622B2 (fr)
CN (1) CN105102807B (fr)
DE (1) DE102012224403A1 (fr)
WO (1) WO2014102028A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2999658A1 (fr) * 2012-12-18 2014-06-20 Delphi Technologies Holding Vanne haute pression
DE102015206538A1 (de) * 2015-04-13 2016-10-13 Robert Bosch Gmbh Druckregelventil mit integriertem Drucksensor
DE102015214816A1 (de) * 2015-08-04 2017-02-09 Continental Automotive Gmbh Hochdruckanordnung
GB2547949B (en) * 2016-03-04 2019-11-13 Johnson Electric Int Ag Plunger for magnetic latching solenoid actuator
FR3064688A1 (fr) * 2017-03-31 2018-10-05 Delphi International Operations Luxembourg S.A R.L. Ensemble rampe et vanne haute pression
CN110552827B (zh) * 2018-06-04 2022-11-11 罗伯特·博世有限公司 用于高压油泵的进油阀和相应的高压油泵

Citations (1)

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Also Published As

Publication number Publication date
WO2014102028A1 (fr) 2014-07-03
JP2016502031A (ja) 2016-01-21
DE102012224403A1 (de) 2014-07-03
US10041459B2 (en) 2018-08-07
JP6343622B2 (ja) 2018-06-13
CN105102807B (zh) 2018-02-06
EP2938875A1 (fr) 2015-11-04
CN105102807A (zh) 2015-11-25
US20160123289A1 (en) 2016-05-05

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